88 lines
1.7 KiB
JavaScript
88 lines
1.7 KiB
JavaScript
/**
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* Shopro + qs-canvas 绘制海报
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* @version 1.0.0
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* @author lidongtony
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* @param {Object} options - 海报参数
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* @param {Object} vm - 自定义组件实例
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*/
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import QSCanvas from 'qs-canvas';
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import { getPosterData } from './poster';
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export default async function useCanvas(options, vm) {
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const width = options.width;
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const qsc = new QSCanvas(
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{
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canvasId: options.canvasId,
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width: options.width,
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height: options.height,
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setCanvasWH: (canvas) => {
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options.height = canvas.height;
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},
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},
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vm,
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);
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let drawer = getPosterData(options);
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// 绘制背景图
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const background = await qsc.drawImg({
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type: 'image',
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val: drawer.background,
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x: 0,
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y: 0,
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width,
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mode: 'widthFix',
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zIndex: 0,
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});
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await qsc.updateCanvasWH({
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width: background.width,
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height: background.bottom,
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});
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let list = drawer.list;
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for (let i = 0; i < list.length; i++) {
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let item = list[i];
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// 绘制文字
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if (item.type === 'text') {
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await qsc.drawText(item);
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}
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// 绘制图片
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if (item.type === 'image') {
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if (item.d) {
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qsc.setCircle({
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x: item.x,
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y: item.y,
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d: item.d,
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clip: true,
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});
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}
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if (item.r) {
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qsc.setRect({
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x: item.x,
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y: item.y,
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height: item.height,
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width: item.width,
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r: item.r,
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clip: true,
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});
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}
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await qsc.drawImg(item);
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qsc.restore();
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}
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// 绘制二维码
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if (item.type === 'qrcode') {
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await qsc.drawQrCode(item);
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}
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}
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await qsc.draw();
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// 延迟执行, 防止不稳定
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setTimeout(async () => {
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options.src = await qsc.toImage();
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}, 100);
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return options;
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}
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